Improvement in governors for steam-engines



T. m. CORBETT & H. CAMPBELL.

Governor for Steam-Engines.

No. 167,225, Pa-tented'Aug; 31,1875.

wrmzssss v I NVENTORS UNITED STATES PATENT EEIoE.

THOMAS M. OORBETT AND HENRY CAMPBELL, OF MILWAUKEE, WISCONSIN; SAIDCAMPBELL ASSIGNOB. TO SAID CORBETT.

IMPROVEMENT IN GOVE RNORS FOR STEAM-ENGINES.

Specification forming part of Letters Patent No. 167,225, dated August31, 1875; application filed March 16, 1875.

To all whom it may concern Be it known that we, THOMAS M. CORBETT andHENRY CAMPBELL, of Milwaukee, in the county of Milwaukee, in the Stateof Wisconsin, have invented certain Improvements in Governors andVariable Gut-Ofi's, of which the following is a specification:

The object of our invention is to govern the motion of a steam-engine;and it consists in a governor keyed onto the driving-shaft, having aneccentric attached thereto with weights and springs, which operate aplate in a groove in the cross-bar, pieces of metal fitting into slotsin the plate to hold it from moving sidewise. The ends of the cross barslide in grooves in projections of the hub, which is keyed onto theengine-shaft. Over the ends of the cross-bar keepers hold the ends ofthe cross-bar so that it can slide in the grooves, and carry with it theeccentric, so that, as the sh aft revolves, the weights, when itrevolves too fast, expand, and the outer ends of the levers move out,and the inner ends of one being secured to the plate which slides in thegroove in the cross-bar, and the other to the piece of metal which fitsin the slot in the plate, the fulcrum of one being attached to one ofthe pieces of metal which fits in the slot in the plate, and the fulcrumof the other to the plate, the plate, which is moved diagonally in thecross-bar, moves the cross-bar and eccentric so as tolessen the throw ofthe valves,

and give less steam to the engine, and thus slackens the speed. When themotion is too slow the weights recede, and the eccentric is moved in acontrary direction, and more throw is given the valves, and a greateramount of steam is supplied.

Figure l is a view of our invention from the hub side, which is keyedonto the engine-shaft Fig. 2, a view of same from the eccentric side;Fig. 3, a view of the sliding plate and crossbar; and Fig. 4, asectional view of the eccentric, cross-bar, plate, and hub.

A is the hub, which is designed to be keyed onto the shaft of asteam-engine; B, a projection extending out on two sides of the hub forthe cross-bar to slide on in grooves in same; 0, a collar secured to thehub; D D, springs, their inner ends secured to opposite sides of collarG, and their outer ends to the levers; E E, levers attached at theirinner ends to the plate F, and to the metal pieces fitting into the slotin plate F; F, plate, which slides in a groove in cross-bar K, with aslot in it, through which passes the engine-shaft, and on each side ofthe shaft metal pieces project from the hub to hold the plate frommoving sidewise; G G, pins, which secure the levers E E to theprojections on hub A; H H, pins, which secure the levers E E to plate F;I I, adjustable weights on the outer ends of levers E E; K, cross-bar,to which is attached eccentric L, which is placed a little on one sideof the cross-bar,'ior the purpose of accommodating itself to the top ofthe valve; M M, keepers, which hold the ends of cross-bar K; N N N N,key, by which the crossbar may be moved sidewise, so as to accommodatethe eccentric L to the top of the valve, which can be done by looseningthem on. either side and driving up the other side; 0, the eccentricstrap; P, a section of the eccentric rod.

We claim as our inventionl. Hub A, projection B, eccentric L, crossbarK, and plate F, all in combination, substantially as set forth.

2. Collar G, springs D D, levers E E, and adjustable weights I I, incombination with plate F and cross-bar K, substantially as described.

3. Hub A, projection B, cross-bar K, and eccentric L, all incombination, substantially as set forth.

4. Gross-bar K, with eccentric L placed a little on one side of it, incombination with plate L, substantially as set forth.

' THOMAS M. GORBETT.

HENRY CAMPBELL. Witnesses:

J. B. SMITH, J. G. WILBER.

